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          2020-06-03-oracle查询session的等待事件
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        <h1 id="查询session的相关信息"><a href="#查询session的相关信息" class="headerlink" title="查询session的相关信息"></a>查询session的相关信息</h1><ul>
<li>查看等待事件</li>
</ul>
<figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">select</span></span><br><span class="line">    <span class="keyword">event</span>,</span><br><span class="line">    <span class="keyword">sum</span>(<span class="keyword">decode</span>(wait_Time, <span class="number">0</span>, <span class="number">0</span>, <span class="number">1</span>)) <span class="string">"Prev"</span>,</span><br><span class="line">    <span class="keyword">sum</span>(<span class="keyword">decode</span>(wait_Time, <span class="number">0</span>, <span class="number">1</span>, <span class="number">0</span>)) <span class="string">"Curr"</span>,</span><br><span class="line">    <span class="keyword">count</span>(*) <span class="string">"Tot"</span></span><br><span class="line"><span class="keyword">from</span></span><br><span class="line">    v $ session_Wait</span><br><span class="line"><span class="keyword">group</span> <span class="keyword">by</span></span><br><span class="line">    <span class="keyword">event</span></span><br><span class="line"><span class="keyword">order</span> <span class="keyword">by</span></span><br><span class="line">    <span class="number">4</span>;</span><br></pre></td></tr></table></figure>

<a id="more"></a>

<ul>
<li>session总体等待</li>
</ul>
<figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">select</span></span><br><span class="line">    a.SID,</span><br><span class="line">    a.USERNAME,</span><br><span class="line">    a.machine,</span><br><span class="line">    a.TERMINAL,</span><br><span class="line">    b.EVENT,</span><br><span class="line">    b.TOTAL_WAITS,</span><br><span class="line">    b.TOTAL_TIMEOUTS</span><br><span class="line"><span class="keyword">from</span></span><br><span class="line">    v $ <span class="keyword">session</span> a,</span><br><span class="line">    V $ SESSION_EVENT b</span><br><span class="line"><span class="keyword">where</span></span><br><span class="line">    a.SID = b.SID</span><br><span class="line">    <span class="keyword">and</span> a.status = <span class="string">'ACTIVE'</span></span><br><span class="line">    <span class="keyword">and</span> <span class="keyword">user</span> <span class="comment"># &gt;0;</span></span><br></pre></td></tr></table></figure>

<ul>
<li>session当前等待</li>
</ul>
<figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">select</span></span><br><span class="line">    a.SID,</span><br><span class="line">    a.USERNAME,</span><br><span class="line">    a.machine,</span><br><span class="line">    a.TERMINAL,</span><br><span class="line">    b.EVENT,</span><br><span class="line">    b.WAIT_TIME,</span><br><span class="line">    b.SECONDS_IN_WAIT,</span><br><span class="line">    b.STATE</span><br><span class="line"><span class="keyword">from</span></span><br><span class="line">    v $ <span class="keyword">session</span> a,</span><br><span class="line">    V $ SESSION_wait b</span><br><span class="line"><span class="keyword">where</span></span><br><span class="line">    a.SID = b.SID</span><br><span class="line">    <span class="keyword">and</span> a.status = <span class="string">'ACTIVE'</span></span><br><span class="line">    <span class="keyword">and</span> <span class="keyword">user</span> <span class="comment"># &gt;0;</span></span><br></pre></td></tr></table></figure>

<ul>
<li>当前session正在执行语句</li>
</ul>
<figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">select</span></span><br><span class="line">    a.SID,</span><br><span class="line">    a.USERNAME,</span><br><span class="line">    a.machine,</span><br><span class="line">    a.TERMINAL,</span><br><span class="line">    b.PIECE,</span><br><span class="line">    b.SQL_TEXT</span><br><span class="line"><span class="keyword">from</span></span><br><span class="line">    v $ <span class="keyword">session</span> a,</span><br><span class="line">    v $ sqltext b</span><br><span class="line"><span class="keyword">where</span></span><br><span class="line">    b.ADDRESS = <span class="keyword">decode</span>(a.SQL_HASH_VALUE, <span class="number">0</span>, a.PREV_SQL_ADDR, a.SQL_ADDRESS)</span><br><span class="line">    <span class="keyword">and</span> a.status = <span class="string">'ACTIVE'</span></span><br><span class="line">    <span class="keyword">and</span> <span class="keyword">user</span> <span class="comment"># &gt; 0</span></span><br><span class="line"><span class="keyword">order</span> <span class="keyword">by</span></span><br><span class="line">    a.SQL_ADDRESS,</span><br><span class="line">    b.PIECE;</span><br></pre></td></tr></table></figure>

<ul>
<li>session当前等待</li>
</ul>
<figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">select</span></span><br><span class="line">    a.SID,</span><br><span class="line">    a.USERNAME,</span><br><span class="line">    a.machine,</span><br><span class="line">    a.TERMINAL,</span><br><span class="line">    c.NAME,</span><br><span class="line">    b.VALUE</span><br><span class="line"><span class="keyword">from</span></span><br><span class="line">    v $ <span class="keyword">session</span> a,</span><br><span class="line">    V $ SESStat b,</span><br><span class="line">    v $ statname c</span><br><span class="line"><span class="keyword">where</span></span><br><span class="line">    a.SID = b.SID</span><br><span class="line">    <span class="keyword">and</span> b.STATISTIC <span class="comment"># = c.STATISTIC #</span></span><br><span class="line">    <span class="keyword">and</span> a.status = <span class="string">'ACTIVE'</span></span><br><span class="line">    <span class="keyword">and</span> <span class="keyword">user</span> <span class="comment"># &gt; 0</span></span><br><span class="line">    <span class="keyword">and</span> b.value &gt; <span class="number">0</span>;</span><br></pre></td></tr></table></figure>
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